One morning, while watching the news, a sudden government broadcast announced the appearance of dungeons. The government is in chaos, the people are ecstatic, and corporations are vying for power. Amidst the swirling ambitions, the protagonist, who accidentally obtains a private dungeon, struggles and runs forward. *The protagonist is just an ordinary high school student with no special status or authority. *People won't feel it unless they experience it themselves. *In the early stages, there may be a sense of inconsistency between words and actions. [Note: This novel has been adapted into a manga and light novel.]